Is it a good strategy if i apply through SDS this time and use the money to buy GIC ?The short answer is no. It should stay for at least 4 months but the recommended is 6 months and above. also your program choice is questionable even though VO didn't mention it.
1.Wait for GCSM notes and then apply.
2.focus on your next SOP and explain every detail.
3. apply after June so that your bank statement won't show 80000
4. make sure you have a healthy/realistic bank transaction until then